"may not be certain" is a correct and usable phrase in written English.
This phrase is often used to express doubt that something is certain or definite. For example: "The outcome of the election may not be certain, but we can still celebrate the victories we have seen so far."
You may not be certain on your definite style but the whole purpose of art school is to experiment.
The outcome of the case may not be certain for years, as it winds through N.L.R.B. proceedings and likely court appeals.
In that case, while it may not be certain, it is likely that the Giants' ownership and management would reject a coach who produced a 6-10 seafterafter a 7-9 seafterafter a Super Bowl.
At the time, Mr. Creswell was working in the studio of the late-Victorian painter George Frederic Watts, who is famous for large allegorical scenes and for the way G.K. Chesterton described him: "He may not be certain that he is successful, or certain that he is great, or certain that he is good, or certain that he is capable: but he is certain that he is right".
Executives may not be certain that government will do a better job, but if it doesn't, at least they won't have to shoulder the blame.
If the position of membership functions may not be certain accurately, then in such cases, the membership degree cannot be chosen as a particular number in [0, 1], then the use of type-2 fuzzy sets is the better option.
So I imagine that you'll get to the execution of Cromwell, and you yourself as a reader or a viewer may not be so certain any more.
For preferred shareholders everywhere, the lesson is clear: your rights may not be as certain as you think, and clever lawyers can often find a way to circumvent a contractual right.
Though beauty may not be a certain guide to truth, the exercise of mathematical modelling as a craft certainly leads to the enjoyment of it.
They, too, routinely add to our quality of life though they may not be in certain circles for well-publicized fanfare.
(2) The second potential problem is that certain LRTs may not be robust to certain patterns of non-adaptive evolution, i.e. they may have high rates of false positives.
